Construction - 9/10
The building is not THAT complex, but very impressive! There is Marble's tracks everywhere, in a huge tube in the center of the map. There's also
Scripting - 8/10
Not a lot of scripting, the Marble are very good. Your character can't move in, and your camera follow the movement of it.
Gameplay - 7/10
Some people could get bored fast.
There is maybe 15-20 runs, each a different color. At the end your ball disappear and there's a button you press that give you points and then teleport you to the start, where you can choose another track, or go to the shop!
Overall - 8/10
It is definitely a game to try!
Here's some pictures
;)